Should I use this cloyster or evolve another Shellder?
The cloyster is 91.1% IV, ATK/DEF/STA, 14/12/15, level 20, with FB/IW; the Shellder is 82.2% IV, 15/13/9. If all get power up to level 20, the first one will be 1400 CP, the second one will be 1372 CP.
Recently, my area has become a Shellder nest, so it is easy to find shellders.
It is not easy to get a good IV Shellder before except for hatching eggs. Now, still not easy, but the chance has already increased. Some third-party radars which are accurate can help.
Answers
If your area has become a nest, I'd keep hunting. If your 82 Shellder is really low level, I'd try to get enough candies to evolve AND level him up to at least 20 before I'd evolve him. In the meantime, there's a chance you might get a decent IV/higher level one.
Icy wind is nothing compared to Blizzard. Frost Breath/Ice Shard is toss-up compared to Icy Wind/Blizzard. If you're going to use him as an efficient Dragonite slayer, he needs Blizzard.
Oh, no, I was saying get enough to candies to evolve AND THEN bring him up to 20 BEFORE even evolving. So if the evolved Cloyster would need 30 candies after evolution to get to 20, get 80 in total before you even evolve. That way you a) might find better in the meantime and b) have insurance if he ends up being and Icy Winder, too...
